Unlike most accessories, informational accessories such as the R.E.K. 3000 do not need to be equipped in an accessory slot. The R.E.K. 3000 may be carried in the player's inventory without loss of functionality, unless equipped to a social slot. Additionally, the info it provides will be shared with nearby players of the same team in multiplayer. Keep in mind modifiers will no longer apply to the player when not equipped.
R.E.K. may stand for the words Rares, Enemies, and Kills, the three displayed functions of this item.